Answer:

Step-by-step explanation:
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Answer:
y = 1x + 15
Step-by-step explanation:
Positive. Keyword is 'above' zero meaning positive numbers. Negative would be 'below' zero.
Answer:
Step-by-step explanation:
It is given that the regression equation

predicts an adult’s height (y) given the individual’s mother’s height (x1), his or her father’s height (x2), and whether the individual is male (x3 = 1) or female (x3 = 0).
The coefficient of x1 = 0.32 represents the increase in height of the child due to one inch increase in mother.
Similarly coefficient of x2 = 0.42 represents the increase in height of the child due to one inch increase in father.
and coefficient of x3 = 5.31 represents the increase in height of the child due to being a male than a female.
Answer:
60
Step-by-step explanation:
There are 5 different ways to choose the first class.
There are 4 classes left to choose from.
There are 4 different ways to choose the second class.
There are 3 classes left to choose from.
There are 3 different ways to chooses the third class.
5*4*3 = 60